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首页> 外文期刊>Bioprocess and Biosystems Engineering >Activated sludge encapsulation in gellan gum microbeads for gasoline biodegradation
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Activated sludge encapsulation in gellan gum microbeads for gasoline biodegradation

机译：吉兰胶微珠中的活性污泥包封，用于汽油的生物降解

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A two-phase dispersion technique, termed emulsification-internal gelation, is proposed for encapsulation of activated sludge in gellan gum microbeads. The influence of emulsion parameters on size distribution of microbeads was investigated. Mean diameter of microbeads varied within a range of 34-265 μm as a descending function of emulsion stirring rate (1,000-5,000 rpm), emulsification time (10-40 min), and emul-sifier concentration (0-0.1% w/w), and as an ascending function of disperse phase volume fraction (0.08-0.25). Encapsulated sludge expressed a high biodegradation activity compared with non-encapsulated sludge cultures even at 4.4 times lower level of overall biomass loading. Over 90% of gasoline at an initial concentration of 35 and 70 mg l~(-1) was removed by both encapsulated and non-encapsulated sludge cultures in sealed serum bottles within 7 days. Encapsulation of activated sludge in gellan gum microbeads enhanced the biological activity of microbial populations in the removal of gasoline hydrocarbons. The results of this study demonstrated the feasibility of the production of size-controlled gellan gum-encapsulated sludge microbeads and their use in the biodegradation of gasoline.
机译：提出了一种称为乳化-内部凝胶化的两相分散技术，用于将活性污泥包封在结冷胶微珠中。研究了乳液参数对微珠尺寸分布的影响。微珠的平均直径在34-265μm范围内变化，这是乳液搅拌速度（1,000-5,000 rpm），乳化时间（10-40 min）和乳化剂浓度（0-0.1％w / w）的下降函数），并作为分散相体积分数（0.08-0.25）的上升函数。与未封装的污泥培养相比，封装的污泥具有较高的生物降解活性，即使在总生物量负载水平低4.4倍的情况下也是如此。在7天内，通过密封和未密封的污泥培养物在密封的血清瓶中去除了90％初始浓度为35和70 mg l（-1）的汽油。吉兰糖胶微珠中活性污泥的包封提高了微生物种群在去除汽油烃中的生物活性。这项研究的结果证明了尺寸控制的吉兰糖胶包裹的污泥微珠的生产及其在汽油生物降解中的可行性。

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